Engine mount system and vibration isolation mechanism using Electro-Rheological fluids and Piezoelectric actuators and its control technique

摘要

The present invention relates to a vibration isolating mechanism and its control method using electro-rheological fluids and Piezoe lectric actuators, and is equipped with a fixing bolt (7) for fastening a chassis on an upper portion thereof, And a decoupler 9 provided with a fixing case 8 for fixing the rubber receiving hole 1 and an electrode plate 2, A lower chamber 5 formed by the separator 9 and the diaphragm 3 for storing an electric fluid flowing from the upper liquid chamber 5, and a diaphragm 3 connected to the fixed case 8. The diaphragm 3 protrudes from the bottom surface of the rigid case 10 having an atmospheric pressure therein and is fixed to the chassis fixing bolt 7, An engine mount system configured in series with a levitation piezoelectric actuator (4) Electricity flowing fluid in the vibration isolation mechanism, that determines the size and the controlled frequency region of the electric field so that the electric field is applied only in the low frequency region of less than a certain frequency;(E is a supply electric field value determined in consideration of the control performance and the performance of the electric field generator, _critIs a critical frequency at which the damping force starts to deteriorate due to the increase of the damping force due to the operation of the electric fluid and the shift of the resonance point), so that damping force of various sizes can be generated using the on-In the actuator 4, only H By using the control technique of the controller, it is possible to perform quick response and precise position control, thereby improving the vibration insulation in the high frequency region and the low frequency region.